A11.00 g milk chocolate bar is found to contain 7.500 g of sugar.
part a) how many milligrams of sugar does the milk chocolate bar contain? express in milligrams in 4 significant figures
part b) what will be the amount of sugar in milligrams if the size of the milk chocolate bar is reduced from 11.00 g to 3.000 g ? express in milligrams in 4 sig figs
part c) given that a 11.00 g milk chocolate bar contains 7.500 g of sugar, calculate the percentage of sugar present in 11.00 g of milk chocolate bar keeping in mind that the answer should have four significant figures (two decimal places).
express your answer numerically to 4 significant figures.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.